ArgOption

Description shown in generated help.

Treats following arguments as operands after this declaration matches.

Short flag name without a prefix, such as "v" for -v or /v.

Omits this option or operand from generated help.

Long flag name without a prefix, such as "verbose" for --verbose or /verbose.

Modes in which this option or operand applies. Leave empty to apply everywhere.

Allows repeated matches for text, unsigned integer, and operand declarations.

Display name for the option value or operand in generated help.

Allows bool long options to accept --no-name in GNU syntax.

Requires this option or operand to be matched before parsing succeeds.

Syntax in which this option applies. AUTO means the parser's active syntax.